Capacitive deionization apparatus

Abstract

A capacitive deionization apparatus provided with an electrode including ferroelectrics having a high dielectric constant, the capacitive deionization apparatus including an electrode including a cathode and an anode while having at least one of the cathode and the anode formed using dielectric material, and a power source unit configured to apply a voltage to the electrode.

What is claimed is: 
     
         1 . A capacitive deionization apparatus comprising:
 an electrode comprising a cathode and an anode while having at least one of the cathode and the anode formed using dielectric material; and   a power source unit configured to apply a voltage to the electrode.   
     
     
         2 . The capacitive deionization apparatus of  claim 1 , wherein the dielectric material has a dielectric constant higher than a dielectric constant of water. 
     
     
         3 . The capacitive deionization apparatus of  claim 1 , wherein the dielectric material is coated on the at least one of the cathode and the anode. 
     
     
         4 . The capacitive deionization apparatus of  claim 3 , wherein the cathode and the anode include conductive material. 
     
     
         5 . The capacitive deionization apparatus of  claim 1 , wherein the cathode and the anode include a mixture of conductive material and dielectric material. 
     
     
         6 . The capacitive deionization apparatus of  claim 1 , wherein the at least one of the cathode and the anode has a specific surface area higher than a predetermined value. 
     
     
         7 . The capacitive deionization apparatus of  claim 6 , wherein the at least one of the cathode and the anode is coated with material having a specific surface area higher than a predetermined value. 
     
     
         8 . The capacitive deionization apparatus of  claim 1 , wherein one of the cathode and the anode is coated with dielectric material having a dielectric constant higher than water, and an other of the cathode and the anode is coated with material having a specific surface area higher than a predetermined value. 
     
     
         9 . The capacitive deionization apparatus of  claim 1 , wherein the power sources apples a voltage greater than 2V. 
     
     
         10 . A capacitive deionization apparatus comprising:
 an electrode comprising a cathode and an anode while having at least one of the cathode and the anode formed using dielectric material; and   a power source unit configured to apply a voltage to the electrode;   wherein the power sources apples a voltage greater than 2V.   
     
     
         11 . The capacitive deionization apparatus of  claim 10 , wherein the dielectric material comprises BaTiO 3  as a base material. 
     
     
         12 . The capacitive deionization apparatus of  claim 11 , wherein the BaTiO 3  base material, further comprises a shifter and/or a depressor. 
     
     
         13 . The capacitive deionization apparatus of  claim 12 , wherein the shifter comprises at least one of BaZrO 3 , SrTiO 3 , BaSnO 3 , CaSnO 3  and PbTiO 3 . 
     
     
         14 . The capacitive deionization apparatus of  claim 12 , wherein the depressor comprises at least one of MgO, MgTiO 3 , NiSnO 3 , CaTiO 3  and Bi 2 (SnO 3 )O 3 . 
     
     
         15 . A capacitive deionization apparatus comprising:
 an electrode comprising a cathode and an anode while having at least one of the cathode and the anode formed using dielectric material; and   a power source unit configured to apply a voltage to the electrode;   wherein the dielectric material comprises BaTiO 3  as a base material.   
     
     
         16 . The capacitive deionization apparatus of  claim 16 , wherein the power sources apples a voltage greater than 2V. 
     
     
         17 . The capacitive deionization apparatus of  claim 15 , wherein the BaTiO 3  base material, further comprises a shifter and/or a depressor. 
     
     
         18 . The capacitive deionization apparatus of  claim 17 , wherein the shifter comprises at least one of BaZrO 3 , SrTiO 3 , BaSnO 3 , CaSnO 3  and PbTiO 3 . 
     
     
         19 . The capacitive deionization apparatus of  claim 17 , wherein the depressor comprises at least one of MgO, MgTiO 3 , NiSnO 3 , CaTiO 3  and Bi 2 (SnO 3 )O 3 .